Does "\d" in regex mean a digit?
In Python-style regex, \d matches any individual digit. If you're seeing something that doesn't seem to do that, please provide the full regex you're using, as opposed to just describing that one particular symbol.
>>> import re>>> re.match(r'\d', '3')<_sre.SRE_Match object at 0x02155B80>>>> re.match(r'\d', '2')<_sre.SRE_Match object at 0x02155BB8>>>> re.match(r'\d', '1')<_sre.SRE_Match object at 0x02155B80>